You can use iTunes to transfer files.
At the top of the Finder window, click Files, then do one of the following:
Transfer from Mac to iPod touch: Drag a file or a selection of files from a Finder window onto an app name in the list.
Transfer from iPod touch to Mac: Click the disclosure triangle beside an app name to see its files on your iPod touch, then drag a file to a Finder window.
To delete a file from iPod touch, select it below an app name, press Command-Delete, then click Delete.
Install or update to the latest version of iTunes on your PC.
See the Apple Support article Transfer files between your PC and devices with iTunes in the iTunes User Guide for Windows.